Pontederia cordata - <a href="https://en.wikipedia.org/wiki/Pontederia_cordata" class="extiw" title="en:Pontederia cordata">Pontederia cordata</a>, <a href="https://en.wikipedia.org/wiki/Plaisance_National_Park" class="extiw" title="en:Plaisance National Park">Plaisance National Park</a>, Quebec, Canada. © Cephas - CC BY-SA 3.0 - Wikimedia Commons